If the firm only acts as an agent for patent application, then they have no obligation to pay the dunning and bear no responsibility. Of course, the general firm will also kindly remind.
According to the landlord's statement, it is stipulated that "all the affairs of the agent of this firm within the validity period of the patent", including writing, application, defense, maintenance, possible review and invalidation. Then, if there is no reminder fee, of course, they will bear the liability for breach of contract, and the specific compensation will be discussed separately according to the value and loss of the signed contract or patent.